Scanning Modes
172
Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
Lateral Averaging
Use Averaging con-
trols with caution
so as not to obscure
significant diagnos-
tic information
Smooths the image by averaging collected data along the
same horizontal line. An increase of the lateral averaging will
reduce noise, but this will also reduce the lateral resolution.
Radial Averaging
Smooths the image by averaging collected data along the
same radial line. An increase of the radial averaging will reduce
noise, but this will also reduce the radial resolution.
When power is re-
duced, it reduces
the signal-to-noise
ratio, so that the im-
age may appear
noisier.
Power
Controls the amount of acoustic power applied in all modes.
When power is set to maximum, it is equal to or less than the
maximum acoustic power level permitted by regulatory
standards. The Thermal Index (TI) and the Mechanical Index
(MI) are displayed on the screen.
Using TVI
1.
Select the desired probe.
2.
While in 2D mode press
TVI
on the control panel, then select
TVI soft-key.
3.
Use the
trackball
to position the ROI frame over the area
to be examined.
The assignable con-
trols of the trackball
are displayed in the
trackball status bar
in the bottom right
corner of the screen.
4.
Press
SET
. The instruction
Size
should be highlighted in the
trackball status bar. If not, press
SET
again to select
Size
.
Note
: If the trackball control
Pointer
is selected, press
TRACKBALL
to be able to select between
Position
and
Size
controls.
5.
Use the
trackball
to adjust the dimensions of the ROI.
To enlarge or narrow the ROI, move the
trackball
to the
left or right.
To lengthen or shorten the ROI, move the
trackball
up or
down.
Optimizing TVI
Refer to page 593
about creating pre-
sets.
The use of preset gives optimum performance with minimum
adjustment. If necessary, the following controls can be adjusted
to further optimize the TVI display:
Содержание Vivid S5
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Страница 30: ...Introduction 12 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 154: ...Basic scanning operations 136 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 250: ...Stress Echo 232 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 260: ...Contrast Imaging 242 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 420: ...Quantitative Analysis 402 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 508: ...Archiving 490 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
Страница 600: ...Peripherals 582 Vivid S5 Vivid S6 User Manual R2424458 100 Rev 2 ...
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